Perhaps they are more accurately described as anti-theists?
Considering how worked up they get over something they claim doesn't exist, you are correct.
Perhaps would could label them theophobic and accuse them of hate crimes against God.
Agreed. I began calling them all antitheists about two years ago.
Among the on-line atheist community at least, that description is a tell for the truly deranged psychotic ones. In an ideal world, atheists would be content to just not believe in God and go about their day. But from my experience, anyone who proudly calls his or herself "anti-theist" is like the fanatical vegans. It's not enough that they don't eat meat, they want to impose their lifestyle on the rest of us and make it mandatory. Anti-theists are the same way; they're little fascist wannabe's who want to destroy anything not like them.